Mitochondrial molecular clocks and the origin of the major Otocephalan clades (Pisces : Teleostei): A new insight

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	Mitochondrial molecular clocks and the origin of the major Otocephalan clades (Pisces : Teleostei): A new insight
	Peng, ZG ; He, SP ; Wang, J ; Wang, W ; Diogo, R
刊名	GENE
	2006-03-29
卷号	370 期号:*页码:113-124
关键词	divergence times relaxed molecular clock mitochondrial genome Otocephala Otophysi
ISSN号	0378-1119
通讯作者	He, SP, Chinese Acad Sci, Lab Fish Phylogenet & Biogeog, Inst Hydrobiol, 7 Donghu S Rd, Wuhan 430072, Peoples R China
中文摘要	The Otocephala, a clade including ostariophysan and clupeomorph telcosts, represents about a quarter of total fish species diversity, with about 1000 gencra and more than 7000 species. A series of recent papers have defended that the origin of this clade and of its major groups may be significantly older than the oldest fossils of each of these groups suggest. Some of these recent papers explicitly defend a Pangean origin for some otocephalan groups Such as the Siluriformes or Cypriniformes. To know whether or not the otocephalans as a whole, and particularly the mainly freshwater, cosmopolitan otophysans could have originated before the splitting of the Pangean Supercontinent is of extreme importance, since otophysan fishes are among the most useful animal groups for the determination of historical continental relationships. In the present work we examined divergence times for each major otocephalan group by an analysis of complete mtDNA sequences, in order to investigate if these divergence times support the hypotheses advanced in recent studies. The complete mtDNA sequences of nine representative non-otocephalan fish species and of twenty-one representative otocephalan species was compared. The present study is thus, among the studies dealing with molecular divergence times of telcosts, the one in which a greater number of otocephalan species are included. The divergence times obtained support that the major otocephalan groups had a much older origin than the oldest fossil records available for these groups suggest. The origin of the Otocephala is estimated as having occurred about 282 Mya, with the origin of the Otophysi being estimated at about 251 Mya. (c) 2005 Elsevier B.V. All rights reserved.
英文摘要	The Otocephala, a clade including ostariophysan and clupeomorph telcosts, represents about a quarter of total fish species diversity, with about 1000 gencra and more than 7000 species. A series of recent papers have defended that the origin of this clade and of its major groups may be significantly older than the oldest fossils of each of these groups suggest. Some of these recent papers explicitly defend a Pangean origin for some otocephalan groups Such as the Siluriformes or Cypriniformes. To know whether or not the otocephalans as a whole, and particularly the mainly freshwater, cosmopolitan otophysans could have originated before the splitting of the Pangean Supercontinent is of extreme importance, since otophysan fishes are among the most useful animal groups for the determination of historical continental relationships. In the present work we examined divergence times for each major otocephalan group by an analysis of complete mtDNA sequences, in order to investigate if these divergence times support the hypotheses advanced in recent studies. The complete mtDNA sequences of nine representative non-otocephalan fish species and of twenty-one representative otocephalan species was compared. The present study is thus, among the studies dealing with molecular divergence times of telcosts, the one in which a greater number of otocephalan species are included. The divergence times obtained support that the major otocephalan groups had a much older origin than the oldest fossil records available for these groups suggest. The origin of the Otocephala is estimated as having occurred about 282 Mya, with the origin of the Otophysi being estimated at about 251 Mya. (c) 2005 Elsevier B.V. All rights reserved.
学科主题	Genetics & Heredity
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Genetics & Heredity
研究领域[WOS]	Genetics & Heredity
关键词[WOS]	COMPLETE NUCLEOTIDE-SEQUENCE ; DIVERGENCE TIME-ESTIMATION ; DNA-SEQUENCE ; MITOGENOMIC PERSPECTIVE ; MAXIMUM-LIKELIHOOD ; PHYLOGENETIC INFERENCE ; OSTARIOPHYSAN FISHES ; OTOPHYSAN FISHES ; GENOME ; EVOLUTION
收录类别	SCI
语种	英语
WOS记录号	WOS:000236641700015
公开日期	2010-10-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/152342/8998]
专题	水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文
作者单位	1.Chinese Acad Sci, Lab Fish Phylogenet & Biogeog, Inst Hydrobiol, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Beijing Inst Genom, Beijing Proteom Inst, Beijing 101300, Peoples R China 3.Chinese Acad Sci, Max Planck Jr Sci Grp, Key Lab Cellular & Mol Evolut, Kunming Inst Zool, Kunming 650223, Peoples R China 4.Museo Nacl Ciencias Nat, Madrid, Spain
推荐引用方式 GB/T 7714	Peng, ZG,He, SP,Wang, J,et al. Mitochondrial molecular clocks and the origin of the major Otocephalan clades (Pisces : Teleostei): A new insight[J]. GENE,2006,370(*):113-124.
APA	Peng, ZG,He, SP,Wang, J,Wang, W,&Diogo, R.(2006).Mitochondrial molecular clocks and the origin of the major Otocephalan clades (Pisces : Teleostei): A new insight.GENE,370(*),113-124.
MLA	Peng, ZG,et al."Mitochondrial molecular clocks and the origin of the major Otocephalan clades (Pisces : Teleostei): A new insight".GENE 370.*(2006):113-124.